Au-Catalyzed Piperidine Synthesis via Tandem Acyloxy Migration/Intramolecular [3+2] Cycloaddition of Enynyl Esters

An Au-catalyzed tandem protocol involving enynyl ester isomerization and subsequent intramolecular [3 þ 2] cyclization has been developed. This strategy provides an efficient approach for the synthesis of polyfunctional piperidines, which are subunits of many bioactive molecules.